<template>
  <div id="root">
    <div class="todo-container">
      <div class="todo-wrap">
        <!-- 头部 -->
        <Header :addTodo="addTodo" />
        <!-- 列表区域 -->
        <List :todos="todos" :deleteTodo="deleteTodo" :checkTodo="checkTodo" />
        <!-- 底部 -->
        <Footer
          :todos="todos"
          :clearDoneTodo="clearDoneTodo"
          :checkAllTodo="checkAllTodo"
          v-if="todos.length"
        />
      </div>
    </div>
  </div>
</template>

<script>
import Header from "./components/Header.vue";
import List from "./components/List.vue";
import Footer from "./components/Footer.vue";

export default {
  name: "App",
  components: { Header, List, Footer },
  data() {
    return {
      todos: [
        { id: "askdf6afs01", todoName: "吃饭", isDone: true },
        { id: "askdf6afs02", todoName: "睡觉", isDone: false },
        { id: "askdf6afs03", todoName: "学习", isDone: true },
        { id: "askdf6afs04", todoName: "玩游戏", isDone: false },
        { id: "askdf6afs05", todoName: "打台球", isDone: true },
      ],
    };
  },
  methods: {
    // 用于向todos数组中添加一个todo对象
    addTodo(todo) {
      this.todos.unshift(todo);
    },
    // 用于从todos数组中删除一个todo对象（根据id删）
    deleteTodo(id) {
      this.todos = this.todos.filter((item) => {
        return item.id !== id;
      });
    },
    // 用于勾选某个todo对象（根据id勾，逻辑：取反）
    checkTodo(id) {
      this.todos.forEach((item) => {
        if (item.id === id) {
          item.isDone = !item.isDone;
        }
      });
    },
    // 用于从todos数组中删除所有已完成的（根据isDone删）
    clearDoneTodo() {
      this.todos = this.todos.filter((item) => {
        return !item.isDone;
      });
    },
    // 全选or全不选
    checkAllTodo(done) {
      this.todos.forEach((item) => {
        item.isDone = done;
      });
    },
  },
};
</script>

<style>
/*base*/
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}

.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>